What is a function?
Identifying Functions

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•
Mathematics
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A function is a relation where every input (x) has exactly one output (y).
2.
FLASHCARD QUESTION
Front
When is y a function of x?
Back
y is a function of x when every x value has only one corresponding y value.
3.
FLASHCARD QUESTION
Front
What does it mean if a table is not a function?
Back
A table is not a function if at least one x value is paired with more than one y value.
4.
FLASHCARD QUESTION
Front
Identify a value of x that makes this table not a function: (1, 2), (1, 3), (2, 4).
Back
1 is the value of x that makes this table not a function.
5.
FLASHCARD QUESTION
Front
In a mapping, how can you tell if y is a function of x?
Back
y is a function of x if every x value has only one y partner.
6.
FLASHCARD QUESTION
Front
What is the vertical line test?
Back
The vertical line test is a method to determine if a curve is a function; if a vertical line intersects the curve at more than one point, it is not a function.
7.
FLASHCARD QUESTION
Front
If a function has the points (2, 3), (2, 5), (3, 4), what can you conclude?
Back
This is not a function because the x value 2 is paired with two different y values.
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